#!/usr/bin/env python3
"""
build_services.py — Service page generator for floorithardwoodfloors.com
Reads data/services.json + services/_template.html
Outputs flat .html files: services/{slug}.html

Usage:
    python3 build_services.py
    python3 build_services.py --slug floor-refinishing
    python3 build_services.py --list
"""

import json
import sys
import argparse
from pathlib import Path
from datetime import datetime

SITE_ROOT    = Path(__file__).parent
DATA_FILE    = SITE_ROOT / "data" / "services.json"
TEMPLATE_FILE = SITE_ROOT / "services" / "_template.html"
OUTPUT_DIR   = SITE_ROOT / "services"


def render_page(service: dict, template: str) -> str:
    html = template
    for key, value in service.items():
        if isinstance(value, str):
            html = html.replace(f"{{{{{key}}}}}", value)
    return html


def build_one(service: dict, template: str, verbose: bool = True) -> Path:
    slug = service["slug"]
    output_path = OUTPUT_DIR / f"{slug}.html"
    html = render_page(service, template)
    output_path.write_text(html, encoding="utf-8")
    if verbose:
        print(f"  Built: services/{slug}.html  ({service.get('service_name', slug)})")
    return output_path


def main():
    parser = argparse.ArgumentParser(description="Build flat service HTML pages from JSON database.")
    parser.add_argument("--slug", help="Build a single service by slug (e.g. floor-refinishing)")
    parser.add_argument("--list", action="store_true", help="List all services in database")
    args = parser.parse_args()

    if not DATA_FILE.exists():
        print(f"ERROR: data file not found: {DATA_FILE}")
        sys.exit(1)
    if not TEMPLATE_FILE.exists():
        print(f"ERROR: template not found: {TEMPLATE_FILE}")
        sys.exit(1)

    services = json.loads(DATA_FILE.read_text(encoding="utf-8"))
    template = TEMPLATE_FILE.read_text(encoding="utf-8")

    if args.list:
        print(f"\nServices in database ({len(services)} total):")
        for svc in services:
            print(f"  {svc['slug']:30s}  {svc.get('service_name','')}")
        return

    OUTPUT_DIR.mkdir(parents=True, exist_ok=True)

    if args.slug:
        matches = [s for s in services if s["slug"] == args.slug]
        if not matches:
            print(f"ERROR: slug '{args.slug}' not found in database.")
            sys.exit(1)
        print(f"\nBuilding single service: {args.slug}")
        build_one(matches[0], template)
    else:
        print(f"\nBuilding {len(services)} service pages...")
        built = []
        for svc in services:
            path = build_one(svc, template)
            built.append(path)
        print(f"\nDone. {len(built)} pages written to services/")

    print(f"Completed at {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}\n")


if __name__ == "__main__":
    main()